Milk Spoilage Quiz

What percentage of protein is found in milk?

• 40%

• 50%

• 32%

• 20%

Which enzyme is responsible for metabolizing lactose?

• Lipase

• Protease

• Lactase

• Amylase

What is a byproduct of lactose metabolism?

• Carbon dioxide

• Glucose

• Fructose

• Ethanol

Which microorganism is associated with spoilage at refrigerator temperatures?

• Halophiles

• Thermophiles

• Psychrophiles

• Mesophiles

What is one of the common spoilage signs of milk?

• Color change

• Sweetness

• Foaming

• Thickening

Which acid is NOT a byproduct of milk spoilage?

• Lactic acid

• Acetic acid

• Citric acid

• Formic acid

What happens to fatty acids in milk during spoilage?

• They evaporate

• They oxidize easily

• They are preserved

• They become solid

What is the primary component of milk that microorganisms target?

• Vitamins

• Minerals

• Lactose

• Water

Which of the following is a sign of milk spoilage?

• Clear appearance

• Smooth texture

• Souring

• Fresh smell

What type of acids are produced from lipid metabolism in milk?

• Volatile fatty acids

• Amino acids

• Sugars

• Nucleic acids